Mass Emails in Zoho CRM

I am pretty sure that I properly sent a mass email to about 50 contacts (I am a paid Zoho CRM subscriber). I sent myself a test email before I sent the mass email and it worked. Normally I would have gotten some response from these people. I am beginning to think that it didn't go through. I can't find any record of it being sent in the audit records. Is there any way to see if it went?